Clarifying Shovel Pass Rules: Trailing Receiver & Forward Laterals

Question
Thank you for your reply.  I must follow up though. I am under the impression that this pass must me thrown to a trailing receiver.  In my situation the receiver of the shovel pass is directly in front of the Qb. The Qb then "pitched" the ball forward "underhand" "basically like a forward lateral" not thrown  or flipped overhand. The receiver then runs with the ball. All of which is done behind the line of scrimmage.  To me, this is "not" a shovel/shuffle/shuttle pass. This, "if it's even legal" (is it a forward lateral?) to me is more like an inside hand off and then would be considered a running play.  Am I right? is this a running play? Is it even a shovel pass? or a forward lateral? Is it legal? Sorry for such a technical question but I need an explanation. Thank you for your time.
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The text above is a follow-up to ...

-----Question-----
Situation:  A shovel or shuffle pass tossed behind the line of scrimmage. Is this rushing yardage or passing yardage?
-----Answer-----
Dear Robert,
A shovel pass, is just a short pass. The yardage gained be it would be under pass yardage.
Coach Louis.

Answer
Dear Robert,
If the ball is thrown to a trailing receiver it is considered a lateral and if it hits the ground it is still in play. This is considered a run play.

If the ball is thrown to a receiver located in front of the quarterback it is considered a pass as long as the quarterback is behind the line of scrimmage. If the quarterback crosses the line of scrimmage it is no longer a legal pass.

And yes, the shovel pass is legal and it is counted under pass yardage.

I hope this answers your question.
Your friend, Coach Louis.